import Vue from 'vue'
import VueRouter from 'vue-router'
import Login from '../components/Login'
import Home from '../components/Home'
import Welcome from '../components/Welcome'
import Users from '../components/User/Users'
import Rights from '../components/Power/rights'
import Roles from '../components/Power/roles'

Vue.use(VueRouter)

const routes = [
  { path: '/', redirect: '/login' },
  { path: '/login', component: Login },
  {
    path: '/home',
    component: Home,
    redirect: '/welcome',
    children: [
      { path: '/welcome', component: Welcome },
      { path: '/users', component: Users },
      { path: '/rights', component: Rights },
      { path: '/roles', component: Roles }
    ]
  }
]

const router = new VueRouter({
  routes
})

// 挂载路由导航守卫、控制用户访问页面权限
router.beforeEach((to, from, next) => {
  // to 要访问的url
  // from 从哪里来
  // next 是一个函数、next()表示放行、next('/login') 强制跳转
  if (to.path === '/login') return next()
  // 获取token 从sessetionStorage
  const tokenStr = window.sessionStorage.getItem('token')
  if (!tokenStr) return next('/login')
  return next()
})

export default router
